refactor: use named argument for pr_number (CodelyTV#36)

Author: rgomezcasas

src/github.sh

@@ -39,7 +39,7 @@ github::add_label_to_pr() {
   local -r l_label="${6}"
   local -r xl_label="${7}"
 
-  local -r body=$(curl -sSL -H "Authorization: token $GITHUB_TOKEN" -H "$GITHUB_API_HEADER" "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/pulls/$1")
+  local -r body=$(curl -sSL -H "Authorization: token $GITHUB_TOKEN" -H "$GITHUB_API_HEADER" "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/pulls/$pr_number")
   local labels=$(echo "$body" | jq .labels | jq -r ".[] | .name" | grep -e "$xs_label" -e "$s_label" -e "$m_label" -e "$l_label" -e "$xl_label" -v)
   labels=$(printf "%s\n%s" "$labels" "$label_to_add")
   local -r comma_separated_labels=$(github::format_labels "$labels")